Investigation of overall mass transfer coefficient of CO2 absorption in packed Column

N. Abd, Zahraa; A. Rushdi, Salih

doi:10.30772/qjes.v13i2.663

	Investigation of overall mass transfer coefficient of CO2 absorption in packed Column
Al-Qadisiyah Journal for Engineering Sciences
Volume 13, Issue 2, June 2020, Pages 153-157 PDF (967.36 K)
DOI: 10.30772/qjes.v13i2.663
Authors
Zahraa N. Abd; Salih A. Rushdi
Chemical Engineering Department -Faculty of Engineering – University of Al-Qadisiyah-Iraq
Abstract
Mixtures of different types of amine solution Monoethanolamine, Diethanolamine, and Triethanolamine were experimentally used to investigate the overall mass transfer coefficient (K_Ga) at different operating parameters. The experiments were made in a packed bed reactor (PBR) with 75 cm in high and10 cm inside diameter as a gas-liquid contactor at 25℃ and atmospheric pressure, using a simulation gaseous mixture (air, carbon dioxide) with recycle stream (semi-continuous process). Experimental design process Taguchi was employed. Four factors and three levels were chosen and exploded using L9 (3 ^4) orthogonal array design. These parameters for semi-continuous process were namely: gas flow rate 5,10,and 15 L/min ,airflow rate80,90,and 100 L/h, liquid flow rate 400,450,and 500 mL/min and time absorption time 30,45,and 60min . A Shimadzu GC-8A Gas Chromatograph with a thermal conductivity detector was used to measure the CO₂ concentration absorbed in aqueous blended solution. The maximum value for CO₂ loading was 8.622 (mol CO₂/mol amine) at 15 L/min gas flow and 450 mL/min liquid flow and 100 L/h airflow for 60 min from absorption time. The results showed that the max value of K_Ga is 0.048 S^-1.
Keywords
CO2 Absorption; Monoethanolamine (MEA; Diethanolamine (DEA); Triethanolamine (TEA); Overall mass transfer coefficient (KGa); Packed Bed Reactor (PBR); Gas Chromatography(GC)

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